Electric distributing system



Patented jan. V6r, 1931 l 1,787,5"mi- NQBUEUMI roam; or SAGA, JAPAN 'Erincfrnrcl nrs'rmnrrir' SYSTEM applicati@ med Vapril 5,

invention `relates to .improvements inV electric ldistributing system and has for its object to provide asimple and economical distributing system capable of'controlling the supply of electric poweI` toeither one or both `sets kof branch lines from a distant switching station through one and the same set of transmission lines` f Y According `to the present invention, Aa. 10 switchingline is laid alongside the transmission lines or ldistributing main, and is.. are' ranged `,to be connected tov any one of the transmission lines at thes'switching station. At each branching'point of the branch'lines l5` or consumers lines,fremot e controlled switchk is arranged and this switch is provided withv an electro-magnet, lthe coil of which is cony nectedl to said switching line/and a proper one 4of,V the transmission lines. When lthe switching line is'connected to one ofthe transmission lines at Vthe switching station,

the correspon-ding set or sets ofel'ectro-magnets to be energizedfby said connection is made to operate the respective remote con- ,25 trolled switches, andthereby the corresponding setor sets of branch lines are closed.

Thus by. changing the :connection of the .Y switching line to one. or the other of the transmission lines, the electric ypower vcan be 3o supplied to either one or both sets of branch lines. f

v Said connection of thev switching line may be controlled by Lsingle pole switches respectively, provided on each* of the transmission A lines, but a multipole switch is preferably used, and b turning its arm, theconnection of the swtc ing line to any one of thetrans-` mission lines can'be changed in a desired manner. Each remote controlled switch, 40 provided at the branching points of the branch lines comprises an electromagnet as mentioned before. One end of the coil of said .electro-magnet is `connected to the switchingrline, and the other end'is cond V425 nected to the properv one of the transmission lines so as `to differ from.,eacl 1 other fork each Y set of branch lines according to the demand Y for electric supply. At one end of the'iron coreof the electro-magnet, a movable iron piece or armature, having brushes for closkthrough transformers ?,y and L;

1922. serial Np; 549,902.

ingAor-opening the circuit ofthe branch line,

is provided.; v A n i The distributing system of thepresentinventionis especially suited for three. phase electric transmission systems, as electric powercan be supplied for two sets of branch lines, separately or at'the same time through one and the same set of transmission lines.

In ordinary practice it is necessary to llayV two sets of transmission linesforsuch a de' mand of supply, butaccording tothe present invention itc'an be attained by addingconly a switching line toa single set of the transmission lines, and therefore wire is ymuch economized,` The present invention, however, is not limited to three-phase systems but it can be' applied also to direct. current or single phase transmission. In these cases it is not so Vgood as in the case of three-phase systems because of the .fact that electric currentlcan not be supplied for different sets of lbranch lines at the same time, but according to the present system the situationof the dis# tributing line can beleasily discriminated at the switching station by the position of the arm ofthe niultipole switch, and it shows much vsuperiority,compared with hitherto known systems in respect that mistakes of distribution can be avoided.

a distributing system according to the pres-V ent invention applied to three-phase electric transmission;` `In the drawing a, ,b and 0 designate. a three phase transmission line or distributing main; d the switching line laid alongside thetransmission line; f, g and e', f g two sets of branch lines; f1, g1, and el, f1', .tc/1, consumers lines respectively connected to the branch lines, fhg andel, f1, g,

'i' and another set of branch lines directly oynnected to vthe transmission lines.

A shows a switch# l ing'station; B a main switch on the translines, ,Y Y i, Each remote controlled switch is similarly constructed and is properly connected to the transmission lines and switching lines according to the demand for supply of electric power to the respective branch lines. It comprises a fixed laminated iron core 1 and a coil 2 around the core l to form an electromagnet adapted to attract a movable iron piece or armature 3. The armature 3 has a stem 4 made of insulating material, provided with brushes 5 or 5, and at the other `end of the stem a spiral spring 6 is provided,

so that when the electro-magnet is energized, the brushes 5 or 5 close the circuits of the respective chamber lines. Whenthe electromagnets are not energized, the branch lines are opened by the action ofthe springs 6. One end of the magnetic coil 2 of eachv automatic switch is'connected to theswitching line d by the Wire d', and the other end is connect-ed to the transmission line b by the wire b in the automatic switch D or similar set, While in the remote controlled switch D or other similar set the other end of the coil is connected to another transmission line c by the wire c. In short, one end of the magnetic coil in each automatic switch is always connected to the switching line, and the other end is connected to either one of the transmission lines except one, for instance a, as shown in the drawing.

The multipole switch c at the switching station comprises a conductive arm 7, revolving onl an axis 8 which is electrically connected to the switching line a?, and three con tact points 91() and 1l respectively connected to -the transmission lines a, b and c, are arranged around the axis 8, so that the switching line may be connected to any one of the transmission lines by turning the arm 7.

The operation of the system is as follows: lVhen it is desired to supply electric power to the branch lines f, g and the similar lines, the arm 7 of the multipole switch C is moved to engage withthe contact point 10, in the switching station a.' Then the switching line d attaining equal potential with that of the transmission line c, a certain potential difference exists between the switching line d and the transmission line b, and therefore in the remote controlled switch D, the electro-mag net is energized and attracts the armature 3. The circuit of the branch line f and g is thus closed by the brushes 5, so that electric power issuppliedtothesaidbranchline. Atthistime the switching line d and the transmission line b are at equal potential and the electromagnet of switch D remains inoperative, so that the branch lines e', f and g are kept open. On the contrary when it is desired to supply electric power to the branch lines c', g, f and similar lines, the arm 7 of the multipole switch is turned so as to come in contact with the contact point 1l at the switching station. Then the switching line d attains equal potential with transmission line b and a difference of poential relatively to line c. Therefore, in the remote controlled switch D the electro-magnet is energized and attracts the armature 3 and moves the brushes 5. At the same time in the remote controlled switch D, the armature 3 is brought back to its original position by the spring 6, and the branch lines f and g open. In case it is desired to supply electric power toy both sets of the branch lines simultaneously the arm 7 of the multipole switch is brought to the contact point 9. Then theiswitching line ci attaining equal potential to the transmission line c shows potential difference for both of the transmission lines b and c, ,and therefore the electro-magnets in both remote controlledv switches D and D are energized, and electric power is supplied to Vthe branch lines f, g and 0, f, g and similar lines at the same time. e

According to the present invention, as above stated, electricpower can be supplied by one andthe same set of transmission lines to either set or both sets of the branch lines by shifting the multipole switch provided at the distantl switching station. Y

l. In an electrical distributing system, a plurality of polyphase feed conductors, a switching station, a selective remote control switch provided at said station and having terminals individually connected to the said feed conductors, a. common operative member of said selective switch, a switching conductor with electro-magnets provided along the said feed conductors and connected to the common operative member, and branch circuit control switches, said electromagnets being connected to the said switching conductor and to one of the said feed conductors respectively, while the other of the said feed conductors is unconnected to any of the electromagnets.

2. In an electrical distributing system, a set of three phase feed'conductors, a switching station, a selective remote control switch provided at said station and having terminals connected to the said feed conductors respectively, a common operative member for said selective switch, a Switching conductor with electromagnets provided along the said feed conductors and connected to the common operative member, and branch circuit control switches, said electromagnets being connected to the said switching conductor and to one of the said feed conductors respectively, one of the said feed conductors being left unconnected to any of the said electromagnets.

In testimony whereof I have aiiixed my signature.

N OBUFUMI TOGAMI. 

